CN205246116U - Engineering structure health monitoring data acquisition system - Google Patents
Engineering structure health monitoring data acquisition system Download PDFInfo
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- CN205246116U CN205246116U CN201520774472.2U CN201520774472U CN205246116U CN 205246116 U CN205246116 U CN 205246116U CN 201520774472 U CN201520774472 U CN 201520774472U CN 205246116 U CN205246116 U CN 205246116U
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Abstract
The utility model relates to an automatic technical field of structural engineering, concretely relates to engineering structure health monitoring data acquisition system, this monitoring system can gather, transmit and handle structural engineering operation mission profile in real time, have that response speed is fast, the reliability is high and characteristics such as low cost, can satisfy the engineering structure construction needs that dispersion, the wide large -scale control in region netted that distribute. The utility model discloses a workstation and surveillance center's server and monitor terminal data early warning system, the site work station is including static data acquisition unit, dynamic data acquisition unit, industrial computer and wireless transmission module. Static data acquisition unit passes through bus and industrial computer communication, and dynamic data acquisition unit passes through capture card and industrial computer communication in the industrial computer, and the industrial computer passes through wireless transmission module and utilizes wireless communication network and surveillance center's server communication, and monitor terminal data early warning system contains warning software and mobile terminal, and the data that can report to the police transfiniting are directly sent by on the related mobile terminal equipment, utensil short information of cell phone notice function.
Description
Technical field
The utility model relates to Structural Engineering technical field of automation, is specifically related to a kind of engineering structure health monitoring dataAcquisition system.
Background technology
From the eighties in 20th century, the highway construction develop rapidly of China, has built various types of highway bridges successively,Have bridge quantity and be positioned at second place of the world. Be accompanied by the sustainable growth of China's economy and the raising of living standards of the people quality,The traffic capacity and bearing capacity to bridge are had higher requirement. Nowadays, bridge is not only as smooth current buildingThing, the development of bridge industry and the progress of bridge technology have become the embodiment of national overall national strength, link up and are promoting various countriesInterchange and the development of culture. But in fast-developing bridge field, when constantly pursuing moulding and material innovation, but ignoreThe operation state of Cheng Qiaohou and quality, can the reliability of the axle casing that puts into effect arrive initial design standard, is worth probing into.In bridge operation stage, because structure is subject to the impact of variable action and accidental action, accumulate over a long period and will cause structure or memberOccur damage in various degree, material property accelerates to degenerate, and shortens the normal service life of bridge.
The bridge health situation of China go fromes bad to worse, and again and again occurs reporting to the police, and should pay close attention. According to statistics, by arrivingIn the end of the year 2013, national highway bridge reaches more than 70 ten thousand. Wherein, bridge proportion is larger, is about 90% of sum, grand bridgeBeam has more than 3,000. Country drops into substantial contribution for the old bridge of maintenance, and transformation unsafe bridge, transforms more than 20,000 of unsafe bridge altogether. In addition, public affairsRoad and bridge, beam overloading was commonplace, once and bridge overload use can make its structure generation be difficult to the internal injury of repairing, frequentlyAfter numerous overload, cause concrete to occur cracking phenomena. The most fatal negative effect of overload is the shadow to bridge normal service lifeRing. If one times of overload of vehicle will cause bridge, shorten 90% service life. In the situation that bridge operation condition go fromes bad to worse,The vicious circle that overloading frequently causes has increased the weight of the damage of bridge structure.
Setting up structural healthy monitoring system is to ensure structural safety operation and the effective means increasing the service life. Structure is strongThe utilization of health monitoring system is arranged on the configuration state of the locational sensor Real-Time Monitoring of structural key, evaluation structure for a long time,When natural environment, transportation condition or operation situation severely subnormal, send early warning signal, for structural maintenance, maintenance and administrative decision are carriedFor foundation and guidance, can find potential problems in the very first time, effectively avoid serious accident.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of engineering structure health monitoring data collecting system, shouldSystem can Real-time Collection, transmission and processing bridge operation technical parameter, has fast response time, reliability is high and with low costEtc. feature, can meet the construction needs of the large-scale monitoring network that bridge distribution disperses, region is wide.
The technical solution of the utility model is:
A kind of engineering structure health monitoring data collecting system, comprise work on the spot station and with work on the spot station channel radioMonitoring central server and the monitor terminal data early warning system of letter.
Work on the spot station comprises static data collecting unit, Dynamic Data Acquiring unit, industrial computer and wireless transport module.Static data collecting unit is communicated by letter with industrial computer by bus, and Dynamic Data Acquiring unit is by capture card and work in industrial computerThe communication of control machine, industrial computer is by wireless transport module and utilize cordless communication network to communicate by letter with monitoring central server. Monitoring eventuallyEnd data early warning system comprises alarm software and mobile terminal, the data of overload alarm directly can be sent to associated movementOn terminal device, tool SMS informing function.
Concrete, static data collecting unit comprise monitoring steady-error coefficient temperature sensor, monitor stress strainThe hydrostatic level of vibratory strain ga(u)ge, monitoring deflection of bridge span, the cracking instrument that monitoring of structures crack changes and monitoring of structures displacementDisplacement meter, Dynamic Data Acquiring unit comprises the vibration pickup of monitoring of structures Vibration Condition.
Concrete, wireless transport module is DTU digital transmission module.
The beneficial effects of the utility model: bridge running technology parameter is divided into static data and moving according to the utility modelState data, static data refers to the structure operation technical parameter that pace of change is slower, as structure box outside temperature, ess-strain, structureAmount of deflection, structural cracks variation and displacement structure etc.; Dynamic data refers to pace of change structure operation faster technical parameter, as structureVibration Condition, involving vibrations frequency, the vibration shape and damped coefficient etc. In the utility model, static data collecting unit is for gatheringStatic data also uses the distributed data acquisition technology based on bus to communicate by letter with on-the-spot industrial computer, Dynamic Data Acquiring unitFor gathering dynamic data and using the centralized data acquisition technology based on board to communicate by letter with on-the-spot industrial computer. Based on busDistributed data acquisition technology have that easy care, wiring are simple, high reliability, its shortcoming is that sample rate is low. BaseHave advantages of that in the centralized data acquisition technology of board sample rate is fast, its shortcoming is that wiring expense is higher, is suitable for movingState monitoring system. The utility model, for the feature of different technologies parameter in structure monitoring operation, adopts respectively above two kinds of numbersGather according to acquisition technique, both met the Technology Need that in engineering reality, structural health detects, and reduced on-the-spot clothThe difficulty of line and cost, have stronger practicality.
The utility model considers that monitoring central server operated by rotary motion is in the city away from Structural Engineering, existing in structureField arranges some data collecting instruments or industrial computer, is responsible for the collection to on-site signal. The collection of structure operation technical parameter is existingMany places are in field, and region that engineering structure distributes is comparatively wide and disperse, and lay special wireline communication network costly,And safeguard that the difficulty of operation and funds spending are all higher. GPRS network is to cover national public network, adopts GPRS to passOne large advantage of transmission of data is exactly that collection in worksite point can be step by step in the whole country, the distance between data center and collection in worksite pointFrom unrestricted, this advantage be private radio communication network (as data radio station, WiMax and WLAN etc.) and wireline communication network withoutMethod analogy. The utility model utilizes DTU digital transmission module and GPRS cordless communication network that on-site signal is transferred to Surveillance centerServer, has reduced construction cost, and fast response time, reliability are high, can meet engineering structure distribute disperse, regionThe construction of wide large-scale monitoring network needs. The utility model project organization is succinct, is applicable to the fortune of national all kinds of engineering structuresBattalion's situation detects, and has larger application and promotes space.
Brief description of the drawings
Fig. 1 is composition schematic diagram of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Embodiment 1
Embodiment 1 is Baotou Yellow River Bridge one bridge, this bridge location in bag luxuriant highway, it be from Baotou Bayan Obo toThe important component part of thoroughfare is economized in Shaanxi etc. This bridge was open to the traffic in nineteen eighty-three, used and had exceeded so far 30 years. Yellow River Bridge oneThe long 810m of bridge full-bridge, access bridge adopts a hole 20m simple prestressed concrete beam; 2～13 across being divided into 3, and every 4 across being 65mEqual altitudes continuous box girder. The main bridge of this bridge respectively all exists many across the inside and outside coxostermum of (2nd～13 across) case beam within the scope of each pier top 10mThe oblique principal tensile stress of bar crack, wherein the the the 2nd, 5,6,9,10,13 across (discontinuous end) due to stressed larger, crack is more serious, allHave oblique through crack, fracture width major part all transfinites. Access bridge (the 1st across) box girder body two coxostermums all exist many articlesVertical Cracks, and part fracture width transfinites. This bridge second expansion joint girder steel fracture, is broken into 5 sections, has lost use function;Expansion joint, San road girder steel attaching parts are damaged, are come off, and affect the normal use at expansion joint. When heavy-duty vehicle passes through this bridge, bridgeBeam vibration sense is obvious. According to " highway bridge and culvert Maintenance specification " (JTGH11-2004) regulation of 3.5.2 article, in Maintenance specificationWith the poorest damaged situation assessment method of vitals, this bridge is assessed as four class bridges, is badly in need of maintenance and reinforcement.
Structure control section stress monitoring, fine strain of millet body Deflection deformation inspection, disease section that embodiment 1 mainly carries out bridge splitMonitoring and the structure of seam variation monitoring, beam end displacement variable quantity monitoring (being the monitoring of support displacement variable quantity), bridge working environmentOverall performance monitoring (being vibration monitoring). As shown in Figure 1, the bridge health monitoring system of embodiment 1 Baotou Yellow River Bridge one bridgeComprise work on the spot station and monitoring central server, wherein, work on the spot station is by static data collecting unit, Dynamic Data AcquiringUnit, industrial computer and DTU digital transmission module composition, insert the data SIM of a China Mobile in DTU digital transmission module. Static numberCommunicate by letter with industrial computer by RS-485 bus and RS485-232 switch according to collecting unit, Dynamic Data Acquiring unit passes through workCapture card in control machine is communicated by letter with industrial computer, and industrial computer is by DTU digital transmission module and utilize GPRS cordless communication network and monitoringCentral server communication. In real work, can adopt CAN bus, ProfiBUS or LonWorks bus to replace RS-485 busComplete the transfer of data of static data collecting unit and industrial computer. Static data collecting unit comprises monitoring bridge box outside temperatureThe vibratory strain ga(u)ge of temperature sensor, monitor stress strain, the hydrostatic level of monitoring deflection of bridge span, monitoring Bridge Crack changeCracking instrument and the displacement meter of monitoring bridge beam end displacement, Dynamic Data Acquiring unit comprises the pick-up of monitoring bridge vibration situationDevice. Embodiment 1 arranges 129 of measuring points altogether, wherein 13 of amount of deflection measuring points (belonging to static data collecting unit), 75 of strain measuring points(comprise the temperature inside the box, belong to static data collecting unit), 1 of environment temperature measuring point (belonging to static data collecting unit), crack is surveyed10 of points (belonging to static data collecting unit), 3 of beam end displacement measuring points (belonging to static data collecting unit), 27 of vibration measuring points(belonging to Dynamic Data Acquiring unit). The sensor arranging on each measuring point is above connected according to minimum wiring principle with industrial computerCarry out. The bridge health monitoring system of embodiment 1 Baotou Yellow River Bridge one bridge brought into operation from April, 2014, can be in unmanned valueKeep under condition operation continuously, it moves data so far and gathers and see the following form 1.
Table 1
Table 1 note: the beginning of sensor number is to represent strain transducer at 1 o'clock, and numerical value unit is μ ε, negative value represents to press shouldPower, on the occasion of representing tension; The beginning of sensor number is to represent that hydrostatic level, numerical value unit are mm at 3 o'clock, under negative value representsScratch, on the occasion of representing arch; The beginning of sensor number is to represent that crack gauge, numerical value unit are mm at 2 o'clock, and negative value represents to shrink, justValue representation extends.
Table 2 is Baotou Yellow River Bridge one bridge strain early warning value.
Table 2 Baotou Yellow River Bridge one bridge strain early warning value
| Position | End bay | Bearing | Inferior end bay |
| Early warning value (μ ε) | -135—150 | -110—110 | -110—130 |
Can find out that from table 1～2 sensor that embodiment 1 monitors maximum and the minimum of a value within the monitoring phase all do not exceedEarly warning value, can find out in conjunction with monitored data from sensor position, and the bridge pad back position of embodiment 1 is all in being subject toPressure condition, span centre position, in tension state, is consistent with actual bridge force-bearing state. The operation shape of embodiment 1 BridgeCondition meets calculation requirement, its structure for the response of vehicular load and environmental load in normal range (NR).
By the monitoring to embodiment 1 Bridge fracture width, the development of fracture width has had certain grasp.Embodiment 1 Bridge was built up in nineteen eighty-three, and because the service time is longer, bridge internal fissure is comparatively serious, wherein top board longitudinal crackDevelopment is very fast, and during monitoring, interior maximum crack width has increased 0.15mm. During monitoring, staff monthly inlet beam entersRow investigation of cracks, discovery has increased the longitudinal crack of span centre diaphragm herringbone bridging position newly. During monitoring, embodiment 1 middle wrapping head HuangThe crack details of river bridge one bridge are in table 3.
Table 3 Baotou Yellow River Bridge one bridge crack numerical value summary sheet
| Position | Fracture width (mm) | The penetration of fracture (mm) |
| No. 13 pier downstream webs | 0.29 | 121 |
| Downstream, No. 9 pier left sides web | 0.45 | 113 |
| No. 7 pier top top boards | 0.78 | 174 |
| No. 8 piers | 0.39 | 130 |
| Upstream, No. 9 pier the right web | 0.31 | 126 |
| Downstream, No. 9 pier the right web | 0.61 | 108 |
| No. 10 pier top top boards | 0.82 | 299 7 --> |
| No. 4 Dun Ding | 0.25 | 99 |
| No. 2 pier upstream webs | 0.21 | 113 |
| No. 3 pier top top boards | 0.49 | 127 |
The slit gauge monitoring of installing in bridge due to embodiment 1 be only the changing value of fracture width, staff is everyThe moon enters scene and has carried out the developed width in crack and the measurement of the degree of depth. Staff finds during measuring, pre-at case back plateBury 20cm place, steel plate left and right, exist symmetrical suitable bridge to crack, wherein the fracture width of bearing place top board is larger, and full-bridge is the widest to be splitSeam position is positioned at 10# Dun Ding, length 65cm, width 0.82mm, degree of depth 299mm. Case back plate thickness is 250mm, and this crack is darkDegree has been carried out to bridge surface waterproof layer. There is longitudinal crack in the top board of span centre position, the wide seam of full-bridge position is positioned at equallyEight across span centre, length 35cm, width 0.27mm, degree of depth 105mm.
Near Baotou Yellow River Bridge one bridge upper component web pier top there are more oblique 45 ° of direction cracks in position, whereinPart pier pushes up perforation cross section, oblique crack, and comparatively serious is the 10th upstream side web inner side, hole is apart from 9# pier top 4,7,9,10mThere are 4 oblique through cracks in position, stitches wide 1.0～1.5mm. Such oblique 45 ° of cracks existence in bridge is comparatively general,Show through checking computation results, can not meet code requirement near the crack resistance of (within the scope of 6～18m) oblique section fulcrum.
Embodiment 1 arranges altogether 9, vibration-testing section on bridge, and each test section is arranged 3 vibration pickups, arranges altogether27 of measuring points. Test section as follows: the 6th across 1/4L, 1/2L, 3/4L section, the 7th across 1/4L, 1/2L, 3/4L section, the 8th across 1/4L, 1/2L section, the 9th are across 1/2L section.
The vibration frequency of embodiment 1 adopts on-line monitoring mode, and after each data acquisition, field erected industrial computer is automaticAnalysis frequency also reaches monitoring central server automatically, and the initial value that this value and vibration modal analysis are obtained is analyzed comparison. LogicalCross the data acquisition in multiple months, analyze its Mode variation and change of frequency trend, judge the Stiffness Deterioration situation of works. Table4 is Baotou Yellow River Bridge one bridge vibration shape change of frequency table during year February in April, 2014 to 2015.
Table 4 Baotou Yellow River Bridge one bridge vibration shape change of frequency table
| Time | Vertical 1 order frequency/Hz | Level 1 order frequency/Hz | Reverse 1 order frequency/Hz |
| 2014.04 | 2.923 | 2.201 | 2.419 |
| 2014.06 | 2.897 | 1.972 | 2.367 |
| 2014.08 | 2.867 | 1.902 | 2.378 |
| 2014.10 | 2.852 | 1.848 | 2.452 |
| 2014.12 | 2.825 | 1.824 | 2.337 |
| 2015.02 | 2.822 | 1.804 | 2.385 |
By the data monitoring analysis in six stages in his-and-hers watches 4, with the Baotou Yellow River Bridge one bridge test knot in January, 2015Fruit be benchmark, and compares in month subsequently, and the discovery vibration shape is basic identical, and change of frequency is less, shows the bridge stiffness of this bridgeThere is not larger degeneration.
The monitoring of Baotou Yellow River Bridge one bridge amount of deflection is mainly to the long-term settlement monitoring of controlling position, adopts static levelInstrument is often being arranged 1 monitoring point across span centre, selects the monitoring result at representational span centre position as the foundation of assessment. From table1 can find out, bridge occurs downwarp phenomenon in during monitoring, be mainly large by vehicular load due to, the maximum downwarp of this bridgePosition is the 6th across span centre, and downwarp value is 8.45mm.
The above embodiment is only preferred embodiment of the present utility model, and the not feasible enforcement of the utility modelExhaustive. For persons skilled in the art, under the prerequisite that does not deviate from the utility model principle and spirit, it is doneAny apparent change going out, within all should being contemplated as falling with claim protection domain of the present utility model.
Claims (3)
1. an engineering structure health monitoring data collecting system, is characterized in that it comprises work on the spot station and with described existingThe monitoring central server of field work station radio communication;
Described work on the spot station comprises static data collecting unit, Dynamic Data Acquiring unit, industrial computer and wireless transport module;Described static data collecting unit is communicated by letter with industrial computer by bus, and described Dynamic Data Acquiring unit is by adopting in industrial computerTruck is communicated by letter with industrial computer, and described industrial computer is by wireless transport module and utilize cordless communication network and monitoring central serverCommunication.
2. a kind of engineering structure health monitoring data collecting system according to claim 1, is characterized in that described static stateData acquisition unit comprises that temperature sensor, the vibratory strain ga(u)ge of monitor stress strain, the monitoring of structures of monitoring steady-error coefficient scratchThe hydrostatic level of degree, the cracking instrument that monitoring of structures crack changes and the displacement meter of monitoring of structures displacement; Described dynamic data is adoptedCollection unit comprises the vibration pickup of monitoring of structures Vibration Condition.
3. a kind of engineering structure health monitoring data collecting system according to claim 1 and 2, is characterized in that described nothingLine transport module is DTU digital transmission module.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108120472A (en) * | 2016-11-29 | 2018-06-05 | 中冶天工集团天津有限公司 | The data acquisition processing method and system of a kind of temporary structure safety monitoring |
| CN110132512A (en) * | 2019-05-30 | 2019-08-16 | 山东省建筑科学研究院 | A kind of bridge structure monitoring and assessing method based on girder stiffness degradation rule |
-
2015
- 2015-10-08 CN CN201520774472.2U patent/CN205246116U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108120472A (en) * | 2016-11-29 | 2018-06-05 | 中冶天工集团天津有限公司 | The data acquisition processing method and system of a kind of temporary structure safety monitoring |
| CN110132512A (en) * | 2019-05-30 | 2019-08-16 | 山东省建筑科学研究院 | A kind of bridge structure monitoring and assessing method based on girder stiffness degradation rule |
| CN110132512B (en) * | 2019-05-30 | 2020-09-22 | 山东省建筑科学研究院有限公司 | Bridge structure monitoring and evaluating method based on girder rigidity attenuation law |
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